/Engine/Source/Runtime/Engine/Classes/Kismet/KismetRenderingLibrary.h
Incredibly inefficient and slow operation! Read entire texture as-is from a render target.
static bool ReadRenderTargetRaw ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContextObject, [UTextureRenderTarget2D](API\Runtime\Engine\Engine\UTextureRenderTarget2D) * TextureRenderTarget, [TArray](API\Runtime\Core\Containers\TArray)< [FLinearColor](API\Runtime\Core\Math\FLinearColor) > & OutLinearSamples, bool bNormalize )